Feasibility of the use of mineral wool fibres recovered from CDW for the reinforcement of conglomerates by study of their porosity

Abstract

The addition of mineral fibres waste does not affect the functionality of mortars.• The porous structure of admixed fibres mortars is similar to that of the reference.• Waste mineral fibres are an alternative to current commercial reinforcements.• Mortars reinforced with mineral fibres waste minimize environmental impact. a b s t r a c tMineral wool is currently the most used insulation in the European Union, and quantities of this waste have increased alarmingly in the last decade, making it essential to recycle or reuse the material, which is not current practice. This study aims to verify the feasibility of compounds of a cement base with additives of insulating mineral fibre residues recovered from the recycling of construction and demolition waste (CDW). For this purpose, experiments were designed to classify the physical-chemical behaviour of architectural mineral wool waste, and that of mortars incorporating them to determine their porosity due to the effects of these fibres on the properties of the compounds. The results obtained show that both the structure and chemical composition as well as the microstructure of the reinforced mortars are viable, and that they would therefore be a sustainable alternative to the current mortars of composite materials.

Investigation on the thermal degradation, moisture absorption characteristics and antibacterial behavior of natural insulation materials

“…The third endothermic peak occurs at 380 °C for sheep wool, 375 °C for goat wool and 400 °C for horse mane. The temperature ranges and trends of TGA, DTGA and DSC curve are very well matched with other researchers [19,[22][23][24] for the insulation materials.…”

Analysis of fire resistance of cement mortars with mineral wool from recycling

“…The following materials were used to carry out the experimental development of the research: The three types of mineral fibre residues underwent pretreatment: they were crushed in a Cutting Mill Retsch M 100 with a 1.5 kW motor and a rotor speed of 1,500 rpm, for 3 intervals of 3 min each, in order to obtain a suitable format for incorporation into the cement matrix (between 500 lm and 1000 lm in length determined by SEM microscopy in previous studies) [23].…”

Ecofibers for the Reinforcement of Cement Mortars for Coating Promoting the Circular Economy

“…This article shows part of the results of a research project that analyses the viability of replacing, in mortars for coatings, glass and polypropylene fibres (fibres commonly used today) by fibres from the recycling of mineral wool insulation panels [13] and analyses their cracking and water behaviour.…”

“…The dosage maintained in all mixtures is 1:3:0.6 (cement: sand: water), (Table 1); this dosage was established based on the bibliography consulted [19][20][21] and the results can be compared with other previous works [13]. The commercial polypropylene fibres used were 6-metre long SikaCim ® Fibres-6 for concrete and mortars from Sika, S.A.U.…”

“…Therefore, in the last decade there have been many studies whose objectives have been to incorporate circular economy criteria in the manufacture of construction materials, specifically on cement mortars, for example the studies by Aciu et al [12], which conclude that it is possible to manufacture mortars with PVC waste, or the studies by Piña et al, [13], that confirm the feasibility of replacing, in mortars, glass or polypropylene reinforcing fibres by fibres from mineral wool residues, or the studies by Morales Conde et al [14], that analyse the Physical and mechanical properties of wood-gypsum composites from demolition material in rehabilitation works or the works done by Gadea et al [15], about lightweight mortar made with recycled polyurethane foam or the research projects done by Muñoz-Ruiperez et al [16], about mortars made with expanded clay and recycled aggregates.…”